How to use Zinc Oxide as an efficient Zinc Fertilizer in crop production?

09 September 2019 1 9K Report

The most common zinc fertilizer sources are zinc sulphate (ZnSO4.7H2O) with 21-22% Zn and zinc oxide with 50-80% Zn. ZnO is sparingly soluble while zinc sulphate is highly soluble in soil. How to improve the solubility of ZnO in soil and make it available to crop plants a challenge. ZnO is also used in the preparation of Zn fortified fertilizers .So how to improve the zinc oxide solubility in soil when applied as straight fertilizer or as fortified with NPK fertilizers?

Michael Schmitt

Do you have access to particle size dependent studies of the ZnO solubility? The procedure within our studies leads to very small (10 nm) and not surface modified ZnO particles. Small particles results in a larger surface area which dissolve faster. If you are able to reproduce the experiments you should be able to measure the lower limit.

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